MESON Chess Problem Database

Problem Display
PID: 245800 (6N1/4r2q/BR1p3r/3knRN1/1Pp3p1/K1B2p2/8/5b2 w - - 0 1)

Shajgarovski, Svetlin Ivanov

Schweizerische Schachzeitung, 1993

6N1/4r2q/BR1p3r/3knRN1/1Pp3p1/K1B2p2/8/5b2

#2

8 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Qxf5
      • 2.Sxe7#
    • 1...Qg6
      • 2.Sxe7#
    • 1...Qh8
      • 2.Sxe7#
    • 1...Rh1
      • 2.Sf6#
    • 1...Rh2
      • 2.Sf6#
    • 1...Rh3
      • 2.Sf6#
    • 1...Rh4
      • 2.Sf6#
    • 1...Rh5
      • 2.Sf6#
    • 1...Rf6
      • 2.Sxf6#
  • Keys
    • 1.Rf4!
      • threat
        • 2.Rd4#
      • 1...Qd3
        • 2.Sxe7#
      • 1...Qe4
        • 2.Sxe7#
      • 1...Sd3
        • 2.Bxc4#
      • 1...Sc6
        • 2.Rb5#
      • 1...Sg6
        • 2.Sf6#
      • 1...Sd7
        • 2.Bb7#
      • 1...Sf7
        • 2.Sxe7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 9
  • Sets
    • Q(j);N_GUARD,N_SPINS(f),XR(D)::S(H),XR(i)
    • Q(j);N_GUARD::S(H),XR(i)
    • R(h);N_GUARD::S(H)
    • R(h);N_GUARD::S(H),XR(h)
  • Actual
    • R(D);N_PINS(f)
    • Threat
      • R1(D)
    • Vars
      • Q(j);N_GUARD,P_PINB(B)::S(H),XR(i)
      • Q(j);N_GUARD::S(H),XR(i)
      • S(f);N_GUARD,S_CUTB(a)::B(F),XP(c)
      • S(f);SBLOCK::R(G)
      • S(f);S_CUTR(h)::S(H)
      • S(f);N_GUARD,S_CUTR(i)::B(F)
      • S(f);S_CUTQ(j)::S(H),XR(i)
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Developed and maintained by Brian Stephenson.
Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) & CSS/Javascript (jQuery, Bootstrap & DataTables).